FEATURE: add contact emails metadata entry to optional plugin meta (#11879)

lib/plugin/metadata.rb

@@ -82,7 +82,7 @@ class Plugin::Metadata
     "discourse-staff-alias",
   ])
 
-  FIELDS ||= [:name, :about, :version, :authors, :url, :required_version, :transpile_js]
+  FIELDS ||= [:name, :about, :version, :authors, :contact_emails, :url, :required_version, :transpile_js]
   attr_accessor(*FIELDS)
 
   def self.parse(text)

spec/components/plugin/metadata_spec.rb

@@ -10,6 +10,7 @@ describe Plugin::Metadata do
 # about: about: my plugin
 # version: 0.1
 # authors: Frank Zappa
+# contact emails: frankz@example.com
 # url: http://discourse.org
 # required version: 1.3.0beta6+48
 
@@ -20,6 +21,7 @@ TEXT
       expect(metadata.about).to eq("about: my plugin")
       expect(metadata.version).to eq("0.1")
       expect(metadata.authors).to eq("Frank Zappa")
+      expect(metadata.contact_emails).to eq("frankz@example.com")
       expect(metadata.url).to eq("http://discourse.org")
       expect(metadata.required_version).to eq("1.3.0beta6+48")
     end